How to Preserve a Flagstone Patio

Flagstone is frequently used to install patios due to the unique appearance and design possibilities of the stones. Flagstones are often broken into small pieces, which are used to make intricate designs that are difficult to recreate with uniformly structured building materials.

1. Ensure that your patio is slightly sloped. Many landscapers feel that patios and many other hardscapes should be completely level. However, a slight slope of 1/4 of an inch for every foot of the patio's length will encourage water to flow away from the patio.


2. Take other measures to prevent water from standing on the patio. Water often pools on patios due to gutters and other drainage systems emptying near the installation. Solve this problem by attaching diverters, or other means of redirecting water flow, to the gutters so that the water is moved away from the patio.


3. Use a sealant to reduce the effects of weathering on your flagstone patio. Partial sealants, such as siloxane, are best for sealing flagstone patios because they reduce the damage caused by heavy rain and other forms of inclement weather, but still allow the pores of the stone access to fresh air. Completely sealing the patio prevents air from entering the stones' pores and may lead to discoloration.


4. Clear excess clutter and debris from the patio frequently. Unnecessary materials obstruct the flow of water as it leaves the patio, which increases the damages caused by pooled water.


5. Keep the patio in a good state of repair. Loose flagstones will allow water and other damaging substances into the patio's interior, which often causes damage to the integrity of the entire structure.